Car-roof sheet.



, for mounting the UNITED STATESPATENT OFFICE.-

JOHN L. MOHUN, or imooKLYN, NEW YORK.

CAR-ROOF SHEET.

To all whom it may concern:

Be it known that I, JOHN L. MOHUN, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have ihvented a certain new In the so-called arch type of car roof in which the metal roofing sheets extend transversely from eaves to eaves of the car and have end flanges turned down over the side plate or frame, it is important that a certain amount of relative movement between the roofing sheet flanges and the frame be provided for-in order to allow for the twisting and weaving movement of the same during the running of the car, and one of the objects of my present invention is to provide improved swiveling means intermediate roofing sheets whereby the end flanges may be spaced from the side frames and have a suflicient movement relative thereto. Another object is to provide an improved fastening means for the end roofing sheets which also allows for a ,racking movement of the side frames of the car.

In.the accompanying drawing: Figure 1 1 is a plan of a portion of a car roof showing the preferred location of the fastening means for the intermediate and the end roofing sheets; Fig. 2, a detailed section showing one form of swivel device for the intermediate sheets at the ridge of the car; Fig. 8, a similar section showing a modified form of swivel device;-Fig. 4, a section of a portion of the car roof at the eaves; Fig. 5, a section through the end plate of the car showing a means'for fastening the end roofing sheet, and Figs. 6 and 7, horizontal sections in detail, showing slightly different modifications of fastenings for the end sheet.

In the arch type of roof as shown inthe drawings, the metal roofing sheets, 7, ex-

spaced therefrom to provide clearance and permit the shifting or swiveling movement Specification of Letters Patent. Patented Feb, 27, 1917. Application filed January 25, 1913. Serial No. 744,072.

of the sheet relative to the frame. The width of the roofing sheets corresponds with the distance between the carlines, 12,

' and the adjacent side edges of the sheets may be covered by the cap members, 13, which may be of any suitable or preferred construction, the form shown being provided with down -turned end flanges, 14, .which may be bolted to tlie'side of the car. The roofing sheets are not fastened by these cap bolts, however, as the flange, S, is notched or cut awayat this point to permit free movement of the same between the side of the car and the end flange, 14, of the cap. 7

For the purpose of spacing the flanges,

8, and swiveling the intermediate rooting sheets, I provide a pivot located preferably at the middle portion of the-sheet at the ridge. This pivot may be formed in a variety of ways, for instance, as shown in Fig. 2, a projection, 9, may be mounted on the ridge pole, 23, and extend into a recess formed by pressing out a hollow boss, 24,

at the middle portion of the roofing sheet, or, as shown in Fig. 3, the boss may be pressed inward and extend into a recess, 9, in the ridge pole. In neither of these constructions .is there any perforation through the sheet, so there is no danger of a leak at this point. As shown in Fig. 4, the end flange, S, of the roofing sheet is turned down over the side plate, 11, and the sheathing, 15, and terminates over' the facia, 16, the proper amount of clearance being provided between the side plate or sheathing and the flange of the sheet to permit of the shifting of the flange during the swiveling movement caused by the racking or weaving motion of the frame during the running of the car. \Vith this construction, the intermediate sheets are adapted to swivel upon these pivots which also serve to center the sheets and maintain the proper spacing or clearance of the end flanges at the eaves.

The end roofing sheet, 7, is, preferably not provided with the central pivot connection but has the end flanges with clearance at the side of the car and also a side flange, 19,"turned down over the end plate, 20, to which it may be securely fastened by ordinary bolts, 21, as shown particularly in Fig. 5. This makes a simple and inexpensive construction which is very serviceable and provides for the racking movement between the end and side plates of the car frame. In Figs. 6 and 7, theside flange, 19, of the end sheet is shown asheld away from the side plate, 20, at the point Where the bolt, 21, passes through the same, thus forming a clear space, 22, around the bolt, which effectually breaks up any creeping of moisture by capillary action along the side of the bolt.

Having now described my invention, What I claim as newvand desire to secure by Letters Patent is v 1. In a car roof, a metal roofing sheet extending transversely from caves to eaves and having down-turned end flanges spaced from the sides of the car and free to move relative thereto, and fastening means for pivotally mounting said sheet at its middle point at the ridge.

2. In a car roof, a metalfroofing sheet extending transversely from eaves to eaves and having down-turned end flanges spaced from the sides of the car and free to move relative thereto, said sheet having a swivel connection at its middle portion to the ridge pole. r v

8. In a car roof, a metal roofing sheet extending transversely from eaves to eaves and havlng down-turned end flanges spaced from the side of the car, said sheet also provided with a raised hollow boss at the ridge, L

and a ridge pole having a projection extending into said boss andvforming a swivel for said sheet.

4. In a car roof, a metal roofing sheet extending from-eaves to eaves at the end of the car and having down-turned end flanges spaced clear from the supporting structure and free to move relative thereto, and a down-turned side flange at the end of the car, and means for rigidly fastening said side flange tothe end plate of the car.

5. In a car roof,'a roofing sheet having a down-turned flange, and a horizontal bolt passing through said flange for fastening the same'to the car frame, said sheet having a hollow raised boss at the point through Which the bolt passes, to form a clear space around thebolt beneath vthe flange.

6. An arched car roof comprising a substructure, arched metal roof sheets extending from eaves to eaves and pivotally con nected at the ridge line to the substructure,

and loosely connected at the'eaves.

' JOHN L. MoHU'N.

Witnesses: I

F. W. MARTIN,

WM. F. LANE. 

